Several months ago our city's police department bought a new "toy"; a trailer containing a radar gun and an electronic sign that tells you exactly how fast you're going as you drive past. Since then, I've seen the speed trailer in several different locations. As I drive by it, I always glance at my speedometer to make sure I'm not going too fast.
Tonight Tony and I were out for a stroll and saw the sign sitting on the side of the road. As we walked past it I wondered what it would take to make the screen activate. After a little experimenting I figured out how to set off a radar speed sign while I was on foot.
It wasn't hard at all. I just danced around in front of it a little bit and waved my arms. There were no cars in the vicinity to see my performance, but the screen showed me moving at 29 miles per hour. After my experiment was over I walked away (at a much slower rate of speed).